As we knew. She announced this in the video in the previous post.
Press Statement
Mark C. Toner
Acting Deputy SpokesmanOffice of Press RelationsWashington, DCMarch 24, 2011
Secretary of State Hillary Rodham Clinton will travel to London, United Kingdom, March 29 to attend an international conference to discuss the Libyan crisis, including ongoing implementation of United Nations Security Council Resolutions 1970 and 1973 and the humanitarian needs of those affected by the conflict.